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No. 624,782. Patented may 9, |899.

A. FucHs. SELF ADJUSTING IRON STAIRCASE.

(Application led Oct. 18, 1897.) No Model.) 2 Sheois'-Sheat I.

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No. 624,782. Patented May 9, |899.

A. FUCHS. f

SELF ADJUSTING IRON STAIRCASE.

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(No Model.)

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TH: Nonms Pneus co., FNo'rauruu., wAsmN N n W'I/VESSES NiTE STATES PATENT OFFICE.

ADOLPH FUCHS, OF LINTZ-ON-TI-IE-RHINE, GERMANY.

SELF-ADJUSTING IRON STAIRCASE,-

SPECIFICATION forming part of Letters Patent No. 624,782, dated May 9, 1899.

applicati@ nea october 1e, 1897.

To @ZZ whom t may concern:

Beit known that I, ADoLrH FUcHs, a subject of the King of Prussia, Emperor of Germany, residing at Iiintz-on-the-Rhine, Germany, have invented certain new and useful Improvements in Self-Ad j usting Iron Staireases; and I do hereby declare the following to be a full, clear, and exact description of the invention, -such as will enable others skilled in the art to which it appertains to make and use the same.

The object of the presentinvention is a selfadjusting iron staircase for use in country houses, stores, vineyards, mines, tbc., the steps and balusters of which adapt themselves automatically to Whatever angle of inclination may be given to the frame.

The invention is illustrated in the accompanying drawings, forming part of the present specicatiom'whereon- Figure lis a diagrammatic view showing the manner of measuring the angle of inclination. Fig. 2 is a side elevation, partly in section, of a form of my improved staircase, showingthe slotted fiat iron F, adjusted to the required angle. Figs. 3, 4, and 5 illustrate details of' the invention. Fig. 6 is an under view of the staircase, showing the ridge pieces in position and also showing the lower rounded bar E in dotted lines. Figs. 7, S, and 9 are perspective views showing the staircase set at different angles of' inclination with and without balustrades. Fig. 7n is a modified form of the staircase in front elevation. Fig. 88N is a side elevation, partly in section, of the same. Fig. 9-a is a section of this modified form, showing the manner of securing the tread. Fig. lOis a detail of the invention.

The two iron beams A and B are pierced in regular spaces and connected from the holes by the T-irons C, Figs. 2, 3, and 6, equally pierced, or by angle-irons N, Figs; 2, 4, and G. The sideplates thus formed are connected by upper rods of' a particular shape-like, for instance, the rods H, Figs. 2, 3, and 6, or rods J, Figs. 2, 4, and 6, or K, Figs, 2, 5, and 6, &G. and, further., by the lower roundbars E, Figs. 2 and 6. The ridge-pieces Il K J being doublefaced, the second edge can be brought forward after the first is Worn oi. The frame is set for the'angle required by the slotted flat Serial No. 655,498, (No model.)

irons F, Figs. 2, 7, 8, and 9, whilethe balusters adjust themselves in a vertical position.

Where the staircase is intended to carry its own weight, the movable angle-irons N will be fitted with triangular props or braces M, as shown in Figs. 2 4c, 6, and 8, on top of which the wooden, &c., steps are fastened.

It may be advisable to increase for self-supporting frames the number of the slotted bars F, Figs. 2 and 8, so as to constitute a kind of girder-framework. Where the stairs are used in a reverse position from .that shown,the vertical plates in front of the single steps will of course become horizontal supports for the steps.

In order to arrange these stairs, no matter what grade they are to assume, it is but necessaryto measure the length of the frame, Fig. l, my. The types I-I G, Figs. 2 and 7, and K Gr, Figs. 2 and 9, are laid on the bare ground in suitable'sections, and after the Tor angle irons are firmly secured in a vertical position by means of the slotted bars F and screws the space back ot' the frame is illed with boulders, concrete, and the like.

The advantages of my improved staircases are obvious and manifold. They are easily arranged and adapted to any position, and they are as easily removed and brought under shelter or some other place.

In the modified form' of the invention, as shown in Figs. 7, 8, 9a, and 10, the balusters and the supports for the steps consist of one single piece of' angle-iron, which `is bent in a right angle and rounded.` By it the upper and lower beams A and B of the side plates are connected Inovably. The'shorter arms serve asl supports for the steps, while the.

longer ones constitute thebalusters, both parts of course adjusting themselves atV the same time. The .diagonal pieces F and O, Fig. 10, which serve to set the whole firmly, areof a particular design to increase friction.

Having thus described my invention, I claiml. A staircase such as described, embody-l ing in its organization the rods A, B, pivot# ally connected with each other in pairs by slotted irons to form lateral supports, a plurality of round bars E connecting said supports,and suitable steps with means coactng IOO with said supports adapted to adjust themselves automatically to any angle of inclination of the staircase, substantially as described;

2. An adjustable iron staircase in which the lateral supports or side pieces are made in two parts connected by movable links, said parts adapted to be secured at any angle of inclination, and said parts being likewise connected by movable rods and by rounded bars; in combination with suitable balusters adapted with the said rounded bars to adjust themselves to any position of the staircase substantially as described.

3. In a staircase of the class described, the rods A and B, forming the lateral supports or side plates of the staircase, links connecting said rods, slotted diagonal irons secured to B connected by movable and slotted crosspieces, of rid ge-pieces connecting said plates, slotted diagonal irons fixed to said plates adapted to secure them at any angle of inclination, and of the round bars E, connecting said plates; in combination with suitable balusters and steps, adapted to adjust themselves automatically to any position of the staircase, substantially as described.

5. In a staircase of the class described, the combination with the pair of side platesA and B of suitable means for movably connecting said side plates, slotted diagonal irons fixed to said plates adapted to secure them at any angle of inclination, ridge-pieces connected to said side plates rounded bars connecting said plates or lateral supports A B, and suitable steps mounted in said staircase adapted to adjust themselves automatically to any position vof the staircase, substantially as de scribed.

In testimony whereof I affix my'signature in presence of two witnesses.

ADOLPI-I FUCHS.

Witnesses:

WILLIAM II. MADDEN, CHRISTEIN PFEIFFER. 

